package com.gzgy.ustore.api.common.util;

import org.apache.commons.lang.StringUtils;

public class EmojiUtil {

    /**
     * 检测是否有emoji字符
     * @param source
     * @return 一旦含有就抛出
     */
    public static boolean containsEmoji(String source) {
        if (StringUtils.isBlank(source)) {
            return false;
        }
        
        int len = source.length();
        
        for (int i = 0; i < len; i++) {
            char codePoint = source.charAt(i);
            
            if (!isEmojiCharacter(codePoint)) {
                //do nothing，判断到了这里表明，确认有表情字符
                return true;
            }
        }
        
        return false;
    }

    private static boolean isEmojiCharacter(char codePoint) {
        return (codePoint == 0x0) || 
                (codePoint == 0x9) ||                            
                (codePoint == 0xA) ||
                (codePoint == 0xD) ||
                ((codePoint >= 0x20) && (codePoint <= 0xD7FF)) ||
                ((codePoint >= 0xE000) && (codePoint <= 0xFFFD)) ||
                ((codePoint >= 0x10000) && (codePoint <= 0x10FFFF));
    }
    
    /**
     * 过滤emoji 或者 其他非文字类型的字符
     * @param source
     * @return
     */
    public static String filterEmoji(String source) {
        
        if (!containsEmoji(source)) {
            return source;//如果不包含，直接返回
        }
        //到这里铁定包含
        StringBuilder buf = null;
        
        int len = source.length();
        
        for (int i = 0; i < len; i++) {
            char codePoint = source.charAt(i);
            
            if (isEmojiCharacter(codePoint)) {
                if (buf == null) {
                    buf = new StringBuilder(source.length());
                }
                
                buf.append(codePoint);
            } else {
            }
        }
        
        if (buf == null) {
            return source;//如果没有找到 emoji表情，则返回源字符串
        } else {
            if (buf.length() == len) {//这里的意义在于尽可能少的toString，因为会重新生成字符串
                buf = null;
                return source;
            } else {
                return buf.toString();
            }
        }
        
    }
    
    public static void main(String aaa[]){
    	String aa="😄😃😀😊☺😉😍😘😚😗😙😜😝😛😳😁😔😌😒😞😣😢😂😭😪😥😰😅😓😩😫😨😱😠😡😤😖😆😋😷😎😴😵😲😟😦😧😈👿😮😬😐😕😯😶😇😏😑👲👳👮👷💂👶👦👧👨👩👴👵👱👼👸😺😸😻😽👺👹😾😹😿🙀😼🙈🙉🙊💀👽💩🔥💧💦💢💥💫🌟✨💤💨👂👀👃👅👄👍👎👌👊✊✌👋🙌👈👉👇👆👐✋🙏☝👏💪🚶🏃💃👫👪👬👭💏💑👯💅💇💆🙋💁🙅🙆👰🙎🙍🙇🎩👒👑👟👞👡👠👢👕👔💼👙👘👖🎽👗👚👜👝👛👓🎀🌂💄💛💙💜💚❤💔💗💋💌💘💞💖💕💓💍💎👤👥💬👣💭🐶🐺🐱🐭🐹🐰🐸🐗🐮🐽🐷🐻🐨🐯🐵🐒🐴🐑🐘🐼🐧🎍💝🐦🐤🐥🐣🐔🐍🐢🐚🐙🐌🐞🐜🐝🐛🐠🐟🐬🐳🐋🐄🐏🐀🐃🐅🐇🐉🐎🐐🐡🐲🐂🐁🐖🐕🐓🐊🐫🐪🐆🐈🐩🐾💐🌸🌷🍀🌹🌻🌺🍄🌾🌿🍂🍃🍁🌴🌲🌳🌰🌱🌼🌐🌞🌝🌚🌑🌒🌓🌔🌙🌛🌜🌘🌗🌖🌕🌍🌎🌏🌋🌌🌠⭐☀⛅☁⚡☔❄⛄🌊🌈🌁🌀🎍💝🎎🎒🎓🎏🎆🎄🎅👻🎃🎑🎐🎇🎁🎋🎉🎊🎈🎌🔮🎥📷📹📼💿📀💽📠📟📞☎📱💻💾📡📺📻🔊🔉🔈🔇🔔🔕📢📣⏳⌛⏰🔎🔑🔐🔏🔒🔓⌚💡🔦🔆🔅🔌🔋🔍🛁🛀🚿🚽🔧🔩🔨💉💊🔪🔫💣🚬🚪💰💴💵💷💶💳💸📲📧📥📤✉📩📨📦📮📭📬📪📫📯📝📄📃📑📊📈📉📜📋📅📆📇📁📂📐📏✏✒📎📌✂📕📗📘📙📓📔📒📚📖🔖📛🔬🔭📰🎶🎵🎼🎧🎤🎬🎨🎹🎻🎺🎷🎸👾🎮🃏🎴🀄🎲🎯🏈🏀⛳🎳🏉🎱🎾⚾⚽🚵🚴🏁🏇🏆🎿🏂🏊🏄🎣☕🍵🍶🍼🍕🍴🍷🍹🍸🍻🍺🍔🍟🍗🍖🍝🍛🍤🍱🍣🍥🍙🍘🍚🍜🍮🍩🍞🍳🍡🍢🍲🍦🍨🍧🎂🍰🍪🍫🍬🍭🍯🍎🍏🍊🍋🍌🍈🍑🍓🍉🍇🍒🍐🍍🍠🍆🍅🌽🏠🏡🏫🏢🏣🏥🏦🏤🏬⛪💒🏨🏩🏪🌇🌆🏯🏰⛺🏭🗼🗾🗻🌄🌅🌃🗽🌉🚤⛵🚢🎢⛲🎡🎠🚣⚓🚀✈💺🚁🚂🚊🚉🚞🚆🚄🚅🚈🚍🚌🚎🚃🚋🚝🚇🚙🚘🚗🚕🚖🚛🚚🚨🚓🚔🚒🚑🚐🚲🎫🚏💈🚜🚠🚟🚡🚦🚥⚠🚧🔰⛽🏮🎰♨🗿🎪🎭📍🚩🇪🇸🇫🇷🇺🇸🇨🇳🇩🇪🇰🇷🇯🇵🇮🇹🇷🇺🇬🇧1⃣2⃣3⃣4⃣5⃣6⃣7⃣🔣#⃣🔢🔟0⃣9⃣8⃣⬆⬇⬅➡🔠🔡🔤↗↖↘↙↔↕🔄ℹ↪↩🔽🔼▶◀⏪⏩⏫⏬⤵⤴🆗🔀🔁🔂🆕🆙🆒🆓🈵🈳🈯🈁🎦📶🆖🈴🈲🉐🈹🈺🈶🈚🚻🚹🚺🚼🚾🚰🚮Ⓜ🈂🈸🈷🚭♿🅿🛂🛄🛅🛃🉑㊙㊗🆑🆘🆔🚫🔞📵🚯❇✳⛔🚸🚷🚳🚱❎✅✴💟🆚📳📴🅰🅱🆎🅾💠➿♻♎♍♌♋♊♉♈♏♐♑♒♓⛎🔯🏧💹💲💱©®™🔜🔛🔙🔚🔝〰〽❌⭕❗❓❕❔🔃🕛🕧🕐🕜🕑🕝🕒🕖🕕🕠🕔🕟🕓🕞🕗🕘🕙🕚🕡🕢🕣🕤🕥🕦✖➕➖➗✔💯💮♦♣♥♠☑🔘🔗➰🔱🔲🔳◼◻◾◽▪▫🔺🔻🔵🔴⚪⚫⬛⬜🔶🔷🔸🔹";
		String bb="的擺";
		System.out.println("aa========"+filterEmoji(aa)+"bb==========="+filterEmoji(bb));
		System.out.println("aa========"+containsEmoji(aa)+"bb==========="+containsEmoji(bb));
		
    }
}